澳大利亚采购需求：液压扭矩扳手、液压螺栓张紧器、气动液压泵、液压缸、电动泵、液压工具

I'm looking for a quote on some hydraulic components based on engineering drawings I'll share. The first part is a long rod made of AISI 4140, which needs to be quenched and tempered, with a specific surface finish of ground and polished to a very tight Ra value. It's crucial that the thread axis remains concentric to within 0.1 mm of the rod body. The second part is a piston crafted from AISI 1045, requiring a precise machined finish without any additional treatments. All dimensions should be in millimeters, and ensure that deburring and edge breaking are included. An inspection report detailing surface finish and critical dimensions is also a must. Please confirm the achievable tolerances and surface finish before providing the production cost. If you have suggestions for any design modifications that could improve manufacturability or cut costs, I'd love to hear them.